Press.



E. HONEGGER.

PRESS.

APPLICATION FILED 001. 2,

Patented Jan. 30, 1912.

2 SHEETS-SHEET 1.

E. HONEGGER.

PRESS, APPLIOATION TILED 00'1.2, 1909.

Patented J an. 30, 1912.

2 SHEETS-SHEET 2.

UNITED STA11$ S PATENT OFFICE.

EMIL HONEGGER, OF OERLIKON, SWITZERLAND, ASSIGNOR TO MASCI-IINENFABRIKOERLIKON, F OERLIKON, SWITZERLAND.

PRESS.

Specification of Letters Patent.

Patented Jan. 30,1912.

To all whom it may concern:

Be it known that I, EMIL HONEGGER, a citizen of Switzerland, residing atOerlikon, Switzerland, have invented new and useful Improvements inPresses, of which the following is a specification.

This invention relates to a hydraulic press for riveting, punching,stamping and the like, which according to the known arrangement, hasbetween the press cylinder, pump, and reservoir, a system of pipes comletely filled with water, and has for its ob ect to provide a float inthe reservoir enabling the use of the press in any position.

In the accompanying two sheets of drawingsFigure 1 is an elevation, andFig. 2 a plan of an electro-hydraulic press to which my invention isapplied, while Figs. 3, 4 and 5 are diagrams showing the flow of theliquid and the subject of my invention more particularly.

Similar letters refer to similar parts throughout the several views.

In carrying out my invention and referring t0 the Figs. 1 and 2, 1 isthe body of the press carrying on its lower arm the fixed tool 2 and onits upper arm the piston cylinder 3. In the latter moves the piston 4carrying at its lower end the tool 5 moving therewith. The pistoncylinder 3 is connected with a reservoir 6 closed outwardly air tight bymeans of a float 7.

On the top of the press body is mounted the worm gear 8 consisting of aworm coupled to the motor and a worm wheel driven by the worm whichgear. by means of the piston rod 10 transmits motion from the motor 9direct to the piston of a differential pump 11. The differential pump 11which is of the known type and is diagrammatically shown in Figs. 3, 4and 5, consists of two cylinders of diflerent diameters, in which worksa ram 28 having two diameters corresponding with those of the cylinders.

' The supply and delivery pipes are connected to the larger cylinder andhave respectively a suction valve and a delivery valve. The deliverypipe is also connected to the smaller cylinder.

Adjacent to the motor 9 is arranged its switch 22. The liquid conveyedby the suction pipe 13 from the reservoir 6 to the pump 11 and by thelatter passed on, is distributed by a piston valve gear 12. Inaccordance with the position in which the valve gear lever 15 is set,the valve gear conveys the liquid coming from the pressure pipe 16either into the pipe 17 over the piston 4 to move it downward or throughthe pipe 18 below to raise it again. Below the piston valve gear 12 isarranged a safety valve 14 as pressure controlling valve by means ofwhich the piston pressure can be varied at will.

The whole of the press is suspended by means of the ring 19 and thecurved arm 20 and rendered turnable around the shaft 26 by means of thehand wheel 23 having a worm 24 and the worm wheel 25. The press mayhowever also be suspended by the ring 27 at the end of the shaft 26.

The operation of the press'is as follows The motor 9 drives the wormgear 8 and the worm wheel shaft thereof forming a crank shaft, by meansof the two connecting rods moves the piston of the differential pistonpump 11 upward and downward, the pump drawing the liquid from thereservoir 6.

When the pump piston 28, Figs. 3, 4 and 5, moves upward the liquidpasses the suction valve 29 and when the piston then moves downward thesuction valve will close and the liquid pass through the pressure valve32, one half of the liquid being conveyed over the pump piston 28 andthe other half according to the position of the valve gear lever 15 andvalve 30. over or below the piston of the press.

The path of the liquid in the two end positions of the valve gear lever15 is as follows 1. Valve gear lever in its lowermost position. DiagramFig. 5.The pump draws the liquid from the reservoir 6, through suctionvalve 29 and forces it through the delivery valve 32 partly to above thepump ram and partly through the pipe 34 into the space left by thedownwardly moving press piston 4. The liquid underneath the press piston4 being thereby displaced, passes through the pipes 35 and 42 into thereservoir and from there again to the pump. Owing to the available areabelow the piston being smaller than that above the same, the surface ofthe water in the reservoir 6 will sink when the press piston descends.The float 7 being air tight will be forced to follow the surface by theatmospheric pressure acting on it. When the piston 4; descends the pipe36 will become closed. As soon as the press piston discontinues todescend, the whole of the pipes leading from the delivery valve to thetop of the cylinder are placed under pressure, hence also pipe 38, thesafety valve 39 being held against its seat by a controllable spring. Ifthe pressure of the liquid becomes greater than the pressure exerted bythe spring 40, the safety valve 39 is forced open and the liquid escapesfrom the pipe 33 to the pipes i1 and- 42 which are in open communicationwith the reservoir 6.

2. VaZoe gear in its uppermost position. 1 Diagram Fig. i.The liquidcirculates from i the reservoir 6 through the suction valve 29 I andpressure valve 32 partly to above the pump piston 28 and partly throughpipe 33, between the valve gear pistons 30 to the; pipe 35 and below thepress piston i which i is thereby moved upward and displaces the liquidabove it which passes through pipes E 3st, tl and 42, into the reservoir6. Owing to the available area above the piston being larger than thatbelow the same, the surface of the water in the reservoir will rise whenthe press piston ascends. The float 7 will j be forced outward by theliquid. The 1 safety valve acts in the manner described 5 under position1.

"Copies of this patent may be obtained for five cents Circulation ofliquid. Diagram Fig. When the press piston has reached its highestposition it will open the pipe 36. The liquid will now circulate frompipe 36 35 pass through suction and pressure valve to pipe 33 betweenthe valve gear pistons 30 to pipe 35 below the press piston at and backto pipe 36. The pump therefore causes the liquid to continuouslycirculate when the 40 valve gear lever and valve gear piston are intheir highest position until the said lever and piston are brought intotheir lowest position again, when the liquid will circulate again asdescribed in reference to Fig. 3. 5

I claim:

In a portable hydraulic press for riveting, punching, stamping and thelike, the combination of a cylinder, plunger, pump, reservoir, andsystem of connecting pipes adapted to be kept filled with liquid, withan air tight float in said reservoir subject to atmospheric pressure andacting as and for the purpose set forth.

in testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EMIL HONEGGER.

Vitnesses CARL GUBLnn, EMIL CONRAD Rnonvonn.

each, by addressing the Commissioner of Patents,

Washington, D. G.

